Renthal Twinring Rear Sprocket (50T) 1500-520-50GPBU - Honda / Yamaha XR250R / YZ125 / YZ250 / YZ450F / WR450F 1988-2026

Product Description

The Renthal Twinring Rear Sprocket is engineered to deliver the ultimate combination of light weight and exceptional longevity for serious off-road and motocross riders. Designed specifically to handle punishing track and trail conditions, this 50-tooth blue sprocket outperforms standard aluminum options while maintaining a highly competitive weight advantage.

Utilizing an innovative dual-material construction, the inner ring features high-strength Ultralight 7075 T-6 aluminum, while the outer ring utilizes an electro-less nickel coated steel design[cite: 1]. The outer ring is expanded at 200°C and fitted over the inner ring, creating a permanent interference fit that, combined with a specialized wave pattern and flat socket head screws, ensures ultimate structural integrity during severe side impacts[cite: 1].

Top Features: Renthal Twinring Rear Sprocket

• Inner ring constructed from high-strength Ultralight 7075 T-6 aluminum identical to standard Renthal sprockets[cite: 1].
• Outer ring features electro-less nickel coated steel optimized with minimal material to reduce weight and maximize durability[cite: 1].
• Precision thermal expansion fit at 200°C combined with flat socket head screws secures a permanent bond and eliminates chain guide interference[cite: 1].
• Integrated self-cleaning mud grooves between each tooth prevent dirt build-up to minimize wear and maintain lower rotating weight[cite: 1].
• Engineered to outlast standard all-aluminum sprockets by up to three times while remaining much lighter than a solid steel alternative[cite: 1].

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: How does the Twinring achieve a permanent bond between the inner and outer rings?
A: The steel outer ring is expanded at 200°C and tightly fitted over the aluminum inner core, creating an interlocking interference fit secured further by flat socket head screws and a distinct wave pattern[cite: 1].

Q: Do the self-cleaning mud grooves actually help with chain and sprocket longevity?
A: Yes, the grooves between each tooth actively clear out dirt and mud with every rotation, preventing abrasive buildup that accelerates chainwheel and chain wear[cite: 1].

Expert Pro-Tip: When replacing your rear sprocket, always inspect your drive chain and front sprocket for matching wear patterns. Installing a new dual-compound sprocket like the Twinring on a heavily worn, stretched chain can drastically reduce its lifespan. Clean and torque your sprocket bolts to factory specifications using a thread-locking compound during installation.

Recommended Pairings:

• MX Chains
• Yamaha YZ250 & YZ250X Performance Parts
• Motorcycle Tools & Accessories

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. We pride ourselves on great customer service, and every item ships FAST - straight to your door.

Moto-House MX - Choice of Champions - Your premier powersports source with great customer service and lightning-fast shipping straight to your door.